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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
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<td>Re: [daip] Taks manual phase-cal</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Tue, 20 Oct 2015 13:27:22 -0600</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Amy Mioduszewski <a class="moz-txt-link-rfc2396E" href="mailto:amiodusz@nrao.edu"><amiodusz@nrao.edu></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>caohongmin <a class="moz-txt-link-rfc2396E" href="mailto:hmcao@outlook.com"><hmcao@outlook.com></a></td>
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Hi Hongmin,<br>
<br>
Can you tell me the project code and date of your observation so I
can have a look at the details? Although what I said before still
applies. Try doing the manual phase cal on source 1 or 3, and
check that it worked O.K., for the other sources for the antenna
that went missing.<br>
<br>
Thanks!<br>
<br>
Amy<br>
<br>
<div class="moz-cite-prefix">On 10/17/2015 07:24 AM, caohongmin
wrote:<br>
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<div dir="ltr">Hi Amy,<br>
<br>
Thanks, it's helpful. I'll try that if there are phase/delay
jumps. <br>
We have 3 targets, after finishing the first one, one of the
antenna just stopped, <br>
while other antennas kept observing other sources. When coming
to the last (3rd) target,<br>
this antenna restarted (the 2nd target is not available for
this antenna). <br>
<br>
best,<br>
hongmin<br>
<br>
<div>> Date: Fri, 16 Oct 2015 14:06:40 -0600<br>
> From: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:amiodusz@nrao.edu">amiodusz@nrao.edu</a><br>
> To: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:egreisen@nrao.edu">egreisen@nrao.edu</a>; <a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:hmcao@outlook.com">hmcao@outlook.com</a><br>
> CC: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:daip@nrao.edu">daip@nrao.edu</a><br>
> Subject: Re: [daip] Taks manual phase-cal<br>
> <br>
> Hi Hongmin,<br>
> <br>
> Unfortunately the answer is, it depends. Do you know
why the antenna <br>
> went missing? There have been phase/delay jumps seen
when setups <br>
> change. If, in particular, the antenna was pre-empted
to do UT1-UTC <br>
> measurements then there might be a problem, because
that involves <br>
> changing setups. So I would do the manual phase-cal,
and check it <br>
> before and after the jump to make sure the correction
is OK for the <br>
> whole time. If there is a problem, it can probably be
worked around, <br>
> get back to me and I can probably give you a recipe.<br>
> <br>
> Amy<br>
> <br>
> On 10/16/2015 12:55 PM, Eric W Greisen wrote:<br>
> >> Hi Eric,<br>
> >><br>
> >> Now I got a problem which i am not sure:<br>
> >> I want to use a very strong source as the
calibrator for manual phase cal<br>
> >> (VLBI data).<br>
> >> But one of the antennas stopped and restarted
before the scan of this<br>
> >> source (note above).<br>
> >> Then whether the manual phase-cal could work
properly for this case (?)<br>
> >><br>
> >> best,<br>
> >><br>
> >> Hongmin<br>
> >><br>
> >><br>
> > My guess is that the phase will change in the
stop/restart<br>
> > so that this antenna's phase will have a jump in
it. Amy<br>
> > may know more.<br>
> ><br>
> > Eric Greisen<br>
> ><br>
> ><br>
> > _______________________________________________<br>
> > Daip mailing list<br>
> > <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:Daip@listmgr.nrao.edu">Daip@listmgr.nrao.edu</a><br>
> > <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://listmgr.nrao.edu/mailman/listinfo/daip">https://listmgr.nrao.edu/mailman/listinfo/daip</a><br>
> <br>
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